The Beast in Space (La Bestia nello spazio) (1980) [Frieda Henkel]: Disintegrated when she runs into an invisible force-field while running towards the computer's control room. (Note: This movie was released as both a mainstream movie and an adult film with additional hardcore scenes.) (Thanks to Johan)

Le Due bocche...di Marina (The Two Mouths of Marina) (1985; adult) [character name unavailable]: Shot to death, along with Paolo Gramignano, by Bruno Alias, after Bruno catches Marina and Paolo in bed together. (Thanks to Johan)